Lubricating-pump.



F. J. CARNEY.

LUBRICATING PUMPx APPLICATION FILED DEC- 3. 1910. RENEWED MAY 20.1916.

1,1 92,274. Patented July 25,1916.

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F. .l. CARNEY.

LUBRICATHVG PUMP.

APPLICATION FILED 050.3.1910. RENEWED MAY 20.1916.

1 1 92,274. Y Patented July 25, 1916.

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v LUBRICATING PUMP.

APPLICATION HLED 050.3. I910. RENEWED MAY 20.19ls.

Patented July 25, 1916.

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FREDERICK J. CARNEY, 0F ERIE, PENNSYLVANIA.

LUBRICATING-PUMP.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed December 3, 1910, Serial No. 595,388. Renewed May 20,1916. Serial No. 98,954.

To all whom it may concern:

Be it known that I, FREDERICK J. CARNEY, a citizen of the United Statesof America, residing at Erie, in the county of Erie and State ofPennsylvania, have invented new and useful Improvements in LubricatingPumps, of which the following is a specication.

This invention relates to lubricating pumps and it consists in the novelfeatures hereinafter described and claimed.

The invention has for its object to provide a device whereby the oilused for lubricating purposes in air compressors and the like may beused over and over again; the lubricant being conveyed from thecompressor to a filtering device from whence it is conveyed by a pump toa lubricating receptacle which in turn feeds the lubricant by gravity tothe parts to be lubricated.

Another object of the invention is to rovide a simple, improved andeffective In ricating device.

Another object of the invention is to improve the construction of thepump, whereby the lubricant is conveyed from the receiving compartmentwhere the pump is located to the lubricating receptacle.

A further object of the invention is to provide means for the return ofthe lubricant from the receptacle to the receiving compartment where thepump is located in the event of overfeed by the pump.

A further object of the invention is to provide a simple and improvedconstruction under which the pump shall be operated directly by theaction of the compressor in connection with which the device is used. Afurther object of the invention is to provide simple and effective meansfor governing the stroke of the pump.

With these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

In the accompanying drawings has been illustrated a simple and preferredform of the inventiomit being, however, understood that no limitation isnecessarily made to the precise structural details therein exhibited,but that changes, alterations and modificaa compartment B into which thelubricant receptacle,

tions within the scope of the claims resorted to when desired.

In the drawings,-Figure 1 is an end elevation of an air compressorequipped with the improved lubricating device. Fig. 2 is a verticalsectional view enlarged taken through the lubricating device, on theplane indicated by the line 2-2 in Fig. 1. Fig. 3 is a verticalsectional view taken through the pump on the plane indicated by the line33 in Fig. 2.

Corresponding parts in the several figures are denoted by likecharacters of reference.

The oil box or casing A, which is equipped with a detachable lid Acontains used oil from the compressor is conveyed through one of theopenings 4 or 5, the other opening being meanwhile obstructed by a plugor stopper of suitable construction. The compartment B within the oilbox A supports a filtering pan C which may be secured in position bysuitable fastening means, such as bolts or screws 6. The pan containsfiltering material such as loosely packed wool which is held in place bymeans of screens 7 of proper mesh. A screen 8 of angular or undulatingform is placed midway in the filtering pan, said screen constituting apartition which permits a portion'of the filtering material to beremoved and renewed without disturbing the rest. A washer 9 of felt orother suitable material is placed beneath the filtering pan may be toprevent undue leakage of oil from the chamber B into the chamber D whichis located adjacent to the chamber B, before passing through thefiltering pan C.

A pump E of special construction, which will be presently more fullydescribed, is located within the chamber D for the pur pose of raisingthe filtered oil from said chamber to the oil chamber or receptacle F.The latter is constructed preferably of a glass cylinder having top andbottom members G and H, the former of which is provided with an inletplug 10. The bottom member H has a downwardly extending boss 11 which isconnected by a pipe 12 with a chamber 13 formed in a projection 14 uponthe casing A. The bottom member H also has an upwardly extending boss 15provided with apertures 16 opening into the Threaded into the boss andextending downwardly through the pipe 12 is an internal pipe 17, thelower 'end of which communicates with the com partment D of the oil boxA through a duct or channel 18, the flow through which may be regulatedby a valve plug 19. The upper end of the pipe 17 is connected by acoupling 20 with a tubular member 21 that extends through the top memberG and has a head 22 bearing upon said top member which is thus assembledwith the bottom member H and with the tubular glass 23 v constitutingthe body of the lubricant recep- V partment D tacle. The tubular member21 is provided with apertures 21 opening into the lubricant receptacledirectly beneath the top member G, thus permitting the contents of thereceptacle when it rises to a certain stage to return to the compartmentD of the oil box through the tubes 21, 17 and the port 18.

The external connecting tube 12 is connected by one or more pipes orducts, as shown at 25, with various points to be lubricated on thecompressor K to which oil will be fed by gravity or force feed, as maybe desired.

The pump of the oil box A, includes a in whicha piston 27 is arrangedupcylinder 26 for reciprocation. The piston is moved w-ardly and held ina raised position by the action of a spring 28. Said spring is coiledabout a stop member 29 which limits and determines the extent of thedownward movement of the piston. The latter is pro,

vided at either end wlth suitable washers 30 to insure a tight fit inthe cylinder. The

cylinder is provided at its upper end with a cap 31 having a port 32 anda union 33 serving to make fast the tubing or duct 34:, whereby the pumpcylinder is connected with a convenient point of the cylinder of thecompressor. The lower cap 35 of the pump cylinder contains besides thestop 29 the upwardly and downwardly opening ports 36, 37 having valveseats, and equipped .7 with ball valves 38, 39, the upwardmoveconsisting of cross bars 10.

37 communicates with ments of which are limited by stop members Thedownwardly opening port the interior of the compartment D of the oil boxA, while the upwardly opening port 36 is connected by a duct 411 withthe chamber 13 communicating with the lower end of the external oil pipe12.

In the operation of this device, the used oil is conveyed from thecompressor by the pipe 1, see Fig. 1, to the compartment B of the oilbox. From this compartment it passes through the filtering device C tothe compartment D from which the 'pump E forces it into the oilreservoir F.

The operation of the pump E is as follows: As the piston of the aircylinder of the compressor moves and travels on its return stroke,

27 expands, and the spring 28 E, which is located in the comconstitutesa gravity feeding device. reservoir also constitutes a storage chamberits connections.

tamed 1n the top of the oil reservoir which toward the end of upward tothe oil reservoir F. WVhen the.

piston of the compressor cylinder reverses of the piston then forces thepiston 27 in an upward 1- rection. The check valve 38 comes to its seatand obstructs the backward flow of oil to the pump check .valve 39 islifted from its seat, and another volume of oil enters the pump. Thus itwill be seen that the downward movement of the piston 27 is causedby thecompression within the compressor cylinder, while the upward movementofthe piston is caused by the expansion of the air back of the pistonassisted by the pressure of the spring 28, and the resultantreciprocating motion of the piston serves to force the oil to thereservoir F. V

The volume, of the oil, and the force of its delivery, may be controlledby the valve plug 19, and an auxiliary controlling valve 41 may beprovided upon the duct 41.

It will be observed that by the use of this invention the lubricatingoilafterbeing used passes to the oil box where it is filtered and purified,after which it is forced by the pump to the oil receptacle or reservoirwhich which, in the event of accident to the pump,

will maintain the supply of lubricant for a considerable period. Thestroke of the pump piston which governs the quantity of oil that isforced by the pump to the reservoir at each pulsation ofthe pump inorder tomaintain the supply in said reservoir is limited in an upwarddirection by the cap 31 and in a downward direction by the stop memberor buffer 29, which latter is to be of a predetermined length toproperly regulate the stroke of the piston. In the event of overfeed,however, the surplus is returned to the oil box A through the internalpipe 17 and An air space is also mainlimits pulsations due to the pumpand .glves an even pressure to the flow of oil.

While, in the foregoing, this invention has been described as beingmainly applica that the invention may applied to other uses which willreadily suggest themselves. 1 V Having thus described the invention,what is claimed as new, is:

1. A pump adapted to be automatically operated by the rise and fall ofthe pressure the air back from the reservoir F, while the Said T ble toair compressors, it is to be understood be advantageously Within thecompressor cylinder of an air compressor comprising a cylinder providedat one end with means for leading fluid pressures therein from thecompressor, a cap closing the opposite end of the cylinder and adaptedto rest upon a support and having a bore of the same diameter as thatthrough the cylinder, said cap being provided at its side with a portwhich communicates with the interior of the cylinder, a piston slidablymounted in the cylinder and a spring interposed between the cap and thepiston and being under tension with a tendency to hold the piston towardthe pressure inlet end of the cylinder.

pump adapted to be automatically operated by the rise and fall of thepressure Within the compressor cylinder of an air compressor comprisinga cylinder provided at one end with means for leading fluidpressuretherein from the compressor, a cap clos- Gopies of this patentmay be obtained for five cents each, by addressing the ing the oppositeend of the cylinder and having a bore of the same diameter as thatthrough the cylinder, said cap being provided at its side with a port, astop located FREDERICK J. CARNEY.

Witnesses:

JAMES N. ALLBunN, MILES B. Krrrs.

Commissioner of Patents,

Washington, D. O.

